TIBBS (Texas Instruments Bulletin Board System) was a computer BBS system that was popular in the early to mid 1980's. TIBBS was the first BBS written to run on the TI-99/4A microcomputer. The program was begun because its author, Ralph Fowler, of Atlanta, Georgia was told by TI's engineers that the machine was not powerful enough to support a BBS.

Approximately 200 systems were sold and many TIBBS systems popped up around the World. Operators ranged from teen-agers to one SysOp (System Operator) in Sacramento, California who was over 70 years old.

After Texas Instruments ceased producing the 99/4A, its enthusiasts just became more supprotive of each other and TIBBS continued into the late 80's. Eventually Fowler turned the program over to the public domain and moved on to a different PC platform.